Relos Var pressed his lips together. “The only way you can permanently destroy a dragon—much as the only way you can permanently destroy their corresponding Cornerstone—is to annihilate both simultaneously. Every dragon has a matching Cornerstone. Unfortunately, while dragons can be slain in a variety of ways, the only method I know to destroy a Cornerstone is Urthaenriel. You can understand why I never bothered telling Duke Kaen where Morios laired; until we had Urthaenriel in our possession, fighting the dragon would have been futile.”
